Shure 715, 215 User Guide
222
AREA
U'OTDEY
CODE
AYE EVPNSTON,
312/328.9000
ILL
(60204) U S
CABLE SHUREMICRO
A.
DATA
I
SHEET
Ceramic and Crystal Microphones
MODELS 215 AND 715
"STARLITE"
I
GENERAL:
type microphones. Model 215 utilizes a ceramic barium
ment and the Model 715 utilizes a Rochelle salt crystal element.
For use under adverse climatic conditions the Ceramic Model 215
is recommended because
and humidity conditions. However, for those applications where level
is the important factor, the higher-output Model 715 is recommended.
Both types have high internal impedance and similar internal
capacitance with high output, smooth response and a semi-directional
pickup characteristic.
The microphone
single conductor, shielded cable.
APPLICATIONS:
or music reproduction and are ideal for amatuer communications, home
recording and low cost paging, intercom, or public address systems.
CONNECTIONS:
should be connected to the grid input of the amplifier. The amplifier
input impedance should be approximately 5 megohms. Resistances as
I
low as
response. The cable shielding should be connected to the amplifier
chassis or ground. The shield, chassis, and amplifier should have a
mutual connection to a water pipe or a similar good ground to prevent
shock hazard from a
If
should be used.
Models 215 and 715 are pressure-operated diaphragm
it
is relatively immune to adverse temperature
is
provided with a 7-foot (2.lm) fabric-covered,
The Models 215 and 715 are excellent for voice
he
center conductor of the cable is "hot" and
megohm can be used but will result in a loss of low frequency
faulty amplifier.
cable
is
required,
a
low
titanate ele-
shielded
end of the 7-foot (2.1~) cable
is equivalent to 50 db below I volt per microbar. E.I.A. Microphone
Rating
GM
(Sensitivity) = -150 db.
across
5 megohms
at
1,000 Hertz. This
OPERATION:
and 715.
connected to a high voltage source.
lions of high humidity and temperatures to 140°F.
Microphones may be seriously damaged if accidentally
The Model 215 Ceramic microphone will operate under
CAUTION:
Model 715, crystal microphone, as the element will
at
temperatures above 125'F.
the sun can easily exceed 125'F. and permanently damage the crystal.
When operating near a radio transmitter, use the minimum length
of cable consistent with placement requirements.
of the cable shield
SPECIFICATIONS:
Model 215:
the 7-foot
valent to 56.5
GM (Sensitivity)
(2.lm)' cable acrdss 5 megohms 'at 1,000 Hertz. This is equi-
Model 715:
Copyright
27A211
1962,
(5-68)
NO
polarizing voltage is required for Models 215
condi-
Caution must be observed in usina and storina the
Temperatures in a closed car parked
is
advisable.
VOLTAGE
(CERAMIC) 1.5 millivolt per microbar at the end of
db below I volt per microbar. E.I.A. Microphone Rating
=
-1
56.5db.
(ROCHELLE SALT) 3.16 millivolt per microbar at the
Shure Brothers,
Inc.
bigin to detere;rate
Careful grounding
SENSITIVITY.
INTERNAL IMPEDANCE:
farad condenser.
RECOMMENDED LOAD IMPEDANCE:
SPECIFICATIONS
Models
in
=Finish
Finish
Dimensions: Height
Cable
Net Weiaht
Shipping Weight
GUARANTEE:
free from electrical and mechanical defects for a period of one year
from date of shipment from factory provided all instructions are complied with fully. In case of damage return the microphone to the
factory for repairs. Our guarantee is voided if the microphone
subjected to abuse or if the case is opened.
x
Width x Thickness
The Models 215 and 715 are guaranteed to be
Equivalent to a 900 Micro-micro-
1-5 megohms.
2
15
Black Front
Gray Back
Light Gray Dark Gray
35'32''
x
(80.2mm x 55.6mm x 32.5mm)
7-f00t (2.1 m) Single Conductor,
2h" x 1352"
Shielded
3.5 ounces
1%
I~S.
Printed
15
7
Gray Front
Black Back
19901
(680;i
in
U.S.A.
is
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